Python Error

import urllib.request
price=99
while price > 5:
    page=urllib.request.urlopen(
        "http://beans-r-us.appspot.com/prices.html")
    text=page.read().decode("utf-8")
    start=text.find(">$")+2
    end=start+4
    price=text[start:end]
    print(price)

    if float(price) > 5.5:
        print("Wait")
    else:
        print("Buy")